You know the experiment is going well when the beaker begins to give the appearance of smoking. Create your own pretend Lab this Halloween. Add a couple of these with some extra body parts and make your neighbors wonder what you are creating this Halloween. This is a mister so the mist will be light and non colored. This is not a smoke and will not be thick as such. You will see a piece inside the green beaker where you fill with water this can get wet. Just fill the green beaker to the misting part but do not submerge mister in water.